Synthesis of gold nanoparticle coated by L-histidine by hydrothermal method

A technology of gold nanoparticles and histidine, which is applied in the field of synthesis of new gold nanomaterials to save raw materials and reduce complexity

Inactive Publication Date: 2009-05-20
NORTHEAST FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As far as we know, there is no direct synthesis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Get prepared 50ml 0.25mM chloroauric acid (HAuCl 4 .3H 2 O) solution in a 250ml beaker, under stirring conditions, add 0.5ml 64mM L-histidine aqueous solution. The pH of the mixed solution was adjusted to 11.50 with a small amount of 1M aqueous sodium hydroxide solution. Take 50ml of this mixed solution in a 50ml hydrothermal reaction kettle, and keep it warm at 150°C for 12 hours, and the wine red solution obtained at last is the final product.

Embodiment 2

[0019] Get the prepared 100ml0.25mM sodium chloroaurate (NaAuCl 4 .3H 2 O) solution in a 250ml beaker, under stirring conditions, add 2ml 64mM L-histidine aqueous solution. The pH of the mixed solution was adjusted to 11.50 with a small amount of 1M aqueous sodium hydroxide solution. Take 100ml of this mixed solution in a 100ml hydrothermal reaction kettle, and keep it warm at 120°C for 12 hours, and the wine red solution obtained at last is the final product.

Embodiment 3

[0021] Get the prepared 100ml0.25mM potassium bromoaurate (KAuBr 4 .xH2O) solution in a 250ml beaker, under stirring conditions, add 0.5ml 64mM L-histidine aqueous solution. The pH of the mixed solution was adjusted to 11.50 with a small amount of 1M aqueous sodium hydroxide solution. Take 100ml of this mixed solution in a 100ml hydrothermal reaction kettle, and keep it warm at 100°C for 6 hours, and the wine red solution obtained at last is the final product.

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Abstract

The invention discloses a method for preparing L-histidine-coated gold nanoparticles by hydrothermal synthesis. A solution of gold nanoparticles prepared by the method is extremely stable and can be kept for more than 6 months at room temperature. The diameter of the obtained gold nanoparticles is between 5 and 50 nanometers, and the obtained gold nanoparticles can be used in fields of nano technology and biology. The pH value of the obtained solution of gold nanoparticles is adjusted to 3 at last. The color of the solution turns from claret-red to purple to violet to blue finally, which indicates that nanoparticles in the solution undergo a certain degree of polymerization. The phenomenon of color variation has certain potential utilization value.

Description

technical field [0001] The invention belongs to the synthesis method of novel gold nanometer material Background technique [0002] The synthesis of gold nanocrystals with various encapsulating shells has received much attention and has been extensively studied. The use of a wide variety of encapsulants is an important factor in the synthesis of gold nanomaterials with different sizes, shapes, and crystal structures. The enveloping shell of gold nanomaterials also determines its end use to a certain extent. Thiols, citrates, polymers, amines, polyols, DNA molecules, and ionic liquids have been reported as encapsulating shells for gold nanomaterials. For biological applications of gold nanomaterials, the synthesis of water-soluble gold nanomaterials with biocompatible enveloping shells has received considerable attention. Amino acids are the structural units that make up proteins, and they can be regarded as ideal biocompatible encapsulating agents. Recently, water-solubl...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 祖元刚刘志国孟荣华谭盛男邢志敏郭松令
Owner NORTHEAST FORESTRY UNIVERSITY
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